Scintillation detection device with pressure sensitive adhesive interfaces

• US 9,057,790 B2
• Filed: 09/30/2012
• Issued: 06/16/2015
• Est. Priority Date: 09/30/2011
• Status: Active Grant

• Current Assignee: Luxium Solutions LLC
• Original Assignee: Saint-Gobain Ceramics & Plastics Incorporated (Compagnie De Saint-Gobain)
• Inventors: Perna, Louis, Bush, Michael L., Wilson, Lance J.
• Primary Examiner(s): Hannaher, Constantine
• Application Number:
  US13/632,046
• Publication Number:
  US 20130092828A1
• Time in Patent Office: 989 Days
• US Class Current: 1/1
• CPC Class Codes: G01T 1/20 with scintillation detectors
• CPC Class Codes: G01T 1/2006 using a combination of a scintillator and photodetector which measures the means radiation intensity
• CPC Class Codes: G01T 1/20185 Coupling means between the photodiode and the scintillator, e.g. optical couplings using adhesives with wavelength-shifting fibres
• CPC Class Codes: G01T 1/20189 Damping or insulation against damage, e.g. caused by heat or pressure
• CPC Class Codes: G01T 1/208 Circuits specially adapted for scintillation detectors, e.g. for the photo-multiplier section
• CPC Class Codes: G01T 1/248 Silicon photomultipliers [SiPM], e.g. an avalanche photodiode [APD] array on a common Si substrate
• CPC Class Codes: G01V 5/04 specially adapted for well-logging

Abstract

A scintillator device includes an optically clear substrate, a scintillator plastic layer overlying the optically clear substrate, and an optically clear polymer layer between the optically clear substrate and the scintillator plastic layer. The optically clear polymer layer can mechanically and optically couple the scintillator plastic layer to the optically clear substrate. Further, the clear polymer layer can be configured to substantially reduce the formation of cracks in the scintillator plastic layer due to thermal expansion, thermal contraction, or a combination thereof, of the scintillator device.

Claims

1. A detector device, comprising:

a housing having an open end and a closed end;

a photosensor within the housing; and

a scintillation device within the housing adjacent to the photosensor, wherein the scintillation device comprises;

a scintillator;

a polymer layer comprising;

a first major surface coupled to an end of the photosensor;

a second major surface coupled to an end of the scintillator; and

a side surface extending between the first major surface and the second major surface;

wherein the polymer layer includes carbon along a backbone of the polymer, and

a reflector including a fluorinated polymer and at least partially surrounding the scintillator and the photosensor, wherein the reflector including a fluorinated polymer extends over and is in direct contact with the entire side surface of the polymer layer.

2. The detector device of claim 1, wherein the polymer layer is optically transparent.

3. The detector device of claim 1, wherein the polymer layer has a transparency of at least 80% for a wavelength range from 350 nm to 700 nm.

4. The detector according to claim 1, wherein the fluorinated polymer includes polytetrafluoroethylene.

5. The detector according to claim 4, wherein the reflector consists essentially of polytetrafluoroethylene.

6. The detector device of claim 1, wherein the polymer layer comprises an initial viscosity at 25°

C. of at least about 10,000 Pa·

s, at least about 15,000 Pa·

s, at least about 20,000 Pa·

s, at least about 25,000 Pa·

s, at least about 30,000 Pa·

s, or at least about 35,000 Pa·

s.

7. The detector device of claim 1, wherein the polymer layer has a density of less than about 1.50 g/cm³, less than about 1.25 g/cm³, less than about 1.20 g/cm³, less than about 1.15 g/cm³, less than about 1.10 g/cm³, less than about 1.05 g/cm³, or less than about 1.00 g/cm³.

8. The detector device of claim 1, wherein the polymer layer includes a Shore “

00”

durometer of at least about 20, at least about 25, at least about 30, or even at least about 35.

9. The detector device of claim 1, wherein the polymer layer comprises a substantially uniform thickness.

10. The detector device of claim 1, wherein the detector device is configured for use in a subterranean or outdoor environment.

11. The detector device of claim 1, wherein the detector device is at least part of a well-logging apparatus or an outdoor port-of-entry detector.

12. The detector device of claim 1, wherein the polymer layer comprises a pressure sensitive adhesive.

13. The detector device of claim 1, wherein a first side of the polymer layer is at least about 95% free of distortions, at least about 96% free of distortions, at least about 97% free of distortions, at least about 98% free of distortions, at least about 99% free of distortions, at least about 99.5% free of distortions, or at least about 99.9% free of distortions.

14. The detector device of claim 1, wherein an adhesion percentage between the first major surface of the polymer layer and a first adhesion zone defined by the end of the photosensor is at least about 95%, such as at least about 96%, at least about 97%, at least about 98%, at least about 99%, at least about 99.5%, or at least about 99.9%.

15. The detector device of claim 1, wherein an adhesion percentage between the second major surface of the polymer layer and a second adhesion zone defined by the end of the scintillator is at least about 95%, such as at least about 96%, at least about 97%, at least about 98%, at least about 99%, at least about 99.5%, or at least about 99.9%.

16. A detector device, comprising:

a housing;

a photosensor disposed within the housing;

a scintillator disposed within the housing adjacent to the photosensor, wherein the scintillator is coupled to the photosensor via a first polymer layer; and

a reflector including a fluorinated polymer and at least partially surrounding the scintillator, wherein the reflector including a fluorinated polymer is coupled to the scintillator via a second polymer layer including an adhesive.

17. The detector device of claim 16, wherein the reflector includes polytetrafluoroethylene.

18. The detector of claim 17, wherein the reflector consists essentially of polytetrafluoroethylene.

19. A detector device, comprising:

a housing;

a single photosensor disposed within the housing;

a scintillation assembly within the housing adjacent to the photosensor, wherein the scintillation assembly comprises;

a plurality of scintillators including at least a first scintillator and a second scintillator,

an optically transparent polymer layer disposed between the first scintillator and the second scintillator,

wherein no reflective material is disposed between the first scintillator and the second scintillator.

20. The detector device of claim 19, wherein a reflector material is disposed adjacent to an outer side surface of the first and second scintillators and opposite the photosensor.